draw.c

   1 /*
   2  * (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5 #include "dmenu.h"
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <X11/Xlocale.h>
   9
  10 /* static */
  11
  12 static unsigned int
  13 textnw(const char *text, unsigned int len) {
  14         XRectangle r;
  15
  16         if(dc.font.set) {
  17                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  18                 return r.width;
  19         }
  20         return XTextWidth(dc.font.xfont, text, len);
  21 }
  22
  23 /* extern */
  24
  25 void
  26 drawtext(const char *text, unsigned long col[ColLast]) {
  27         int x, y, w, h;
  28         static char buf[256];
  29         unsigned int len, olen;
  30         XGCValues gcv;
  31         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  32
  33         XSetForeground(dpy, dc.gc, col[ColBG]);
  34         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  35
  36         if(!text)
  37                 return;
  38
  39         w = 0;
  40         olen = len = strlen(text);
  41         if(len >= sizeof(buf))
  42                 len = sizeof(buf) - 1;
  43         memcpy(buf, text, len);
  44         buf[len] = 0;
  45
  46         h = dc.font.ascent + dc.font.descent;
  47         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  48         x = dc.x + (h / 2);
  49
  50         /* shorten text if necessary */
  51         while(len && (w = textnw(buf, len)) > dc.w - h)
  52                 buf[--len] = 0;
  53         if(len < olen) {
  54                 if(len > 1)
  55                         buf[len - 1] = '.';
  56                 if(len > 2)
  57                         buf[len - 2] = '.';
  58                 if(len > 3)
  59                         buf[len - 3] = '.';
  60         }
  61
  62         if(w > dc.w)
  63                 return; /* too long */
  64
  65         gcv.foreground = col[ColFG];
  66         if(dc.font.set) {
  67                 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
  68                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc,
  69                                 x, y, buf, len);
  70         }
  71         else {
  72                 gcv.font = dc.font.xfont->fid;
  73                 XChangeGC(dpy, dc.gc, GCForeground | GCFont, &gcv);
  74                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  75         }
  76 }
  77
  78 unsigned long
  79 getcolor(const char *colstr, const char *alternate) {
  80         Colormap cmap = DefaultColormap(dpy, screen);
  81         XColor color;
  82
  83         if(XAllocNamedColor(dpy, cmap, colstr, &color, &color) != Success)
  84                 XAllocNamedColor(dpy, cmap, alternate, &color, &color);
  85         return color.pixel;
  86 }
  87
  88 void
  89 setfont(const char *fontstr) {
  90         char **missing, *def;
  91         int i, n;
  92
  93         missing = NULL;
  94         setlocale(LC_ALL, "");
  95         if(dc.font.set)
  96                 XFreeFontSet(dpy, dc.font.set);
  97         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
  98         if(missing) {
  99                 XFreeStringList(missing);
 100                 if(dc.font.set) {
 101                         XFreeFontSet(dpy, dc.font.set);
 102                         dc.font.set = NULL;
 103                 }
 104         }
 105         if(dc.font.set) {
 106                 XFontSetExtents *font_extents;
 107                 XFontStruct **xfonts;
 108                 char **font_names;
 109
 110                 dc.font.ascent = dc.font.descent = 0;
 111                 font_extents = XExtentsOfFontSet(dc.font.set);
 112                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 113                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 114                         if(dc.font.ascent < (*xfonts)->ascent)
 115                                 dc.font.ascent = (*xfonts)->ascent;
 116                         if(dc.font.descent < (*xfonts)->descent)
 117                                 dc.font.descent = (*xfonts)->descent;
 118                         xfonts++;
 119                 }
 120         }
 121         else {
 122                 if(dc.font.xfont)
 123                         XFreeFont(dpy, dc.font.xfont);
 124                 dc.font.xfont = NULL;
 125                 dc.font.xfont = XLoadQueryFont(dpy, fontstr);
 126                 if (!dc.font.xfont)
 127                         dc.font.xfont = XLoadQueryFont(dpy, "fixed");
 128                 if (!dc.font.xfont)
 129                         eprint("error, cannot init 'fixed' font\n");
 130                 dc.font.ascent = dc.font.xfont->ascent;
 131                 dc.font.descent = dc.font.xfont->descent;
 132         }
 133         dc.font.height = dc.font.ascent + dc.font.descent;
 134 }
 135
 136 unsigned int
 137 textw(const char *text) {
 138         return textnw(text, strlen(text)) + dc.font.height;
 139 }